Jim O'Brien

Using the linearized Einstein gravitational field equations and the Maxwell field equations it is shown that the plane of polarization of an electromagnetic wave is rotated by the gravitational field created by the electromagnetic radiation of a ring laser. It is further shown that this gravitational Faraday effect shares many of the properties of the standard electromagnetic Faraday effect. An experimental arrangement is then suggested for the observation of this gravitational Faraday effect induced by the ring laser

Teilhard’s cosmological speculation is a valuable basis for an environmental ethics that perceives individual natural objects as good in themselves and the world as good in itself. Teilhard perceives man as fundamentally part of a cosmic environmental whole that is greater than mankind taken individually or collectively. His holistic views on human biological and psychological and social evolution are, I argue,compatible with a biocentric environmental ethics. I discuss some similarities and differences with the views of the deep ecology movement. I show that Teilhard’s hierarchical system is not humanistically oriented in a way that need be interpreted by Teilhardians as contrary to environmental well-being. I argue that Teilhard’s sympathies toward transportation technology, including the automobile, can be interpreted in his holistic manner. I conclude that Teilhard’s theocentric views are also a basis for supporting an environmental ethics which is both optimistic and not anthropocentric

IT has been affirmed frequently that Aristotle’s Physics contains no concept of inertia. Indeed this character, coupled with his great subsequent influence up to the Renaissance, is often considered a key reason for the charge that Aristotle produced a set-back of one thousand years in the development of physics. Our purpose here is to attempt to put in a balanced perspective the Aristotelian doctrine and ancient anticipations of the concept of inertia; no attempt is made to study the medieval period. A classic passage cited to illustrate the position of Aristotle is the analysis of projectile motion in Book VIII of the Physics.

Doctors have an ethical and legal duty to respect patient confidentiality. We consider the basis for this duty, looking particularly at the meaning and value of autonomy in health care. Enabling patients to decide how information about them is disclosed is an important element in autonomy and helps patients engage as active partners in their care.Good quality data is, however, essential for research, education, public health monitoring, and for many other activities essential to provision of health care. We discuss whether it is necessary to choose between individual rights and the wider public interest and conclude that this should only rarely be necessary. The paper makes some recommendations on practical steps which could help ensure that good quality information is available for work which benefits society and the public health, while still enabling patients’ autonomy to be respected